小麦单株产量及其相关性状的全基因组QTL分析

Genome-wide QTL analysis for wheat grain yield per plant and other related traits

探索和鉴定调控小麦产量因子的基因位点有助于产量的遗传改良。以安农0711/烟农19 BC1F2回交群体(680个家系)为供试材料,单粒播种,于黄熟期测定单株有效穗数,收获后测定穗粒数、千粒重及单株产量。利用完备区间作图法对上述单株产量及其相关性状进行全基因组QTL定位。结果表明,控制千粒重的QTL有3个,主要分布在染色体1D(2个)和4B(1个)上,分别位于标记区间Xcfd27-Xwmc432,Xwmc432-Xcfd61和Xwmc89-Xwmc48;控制单株产量和单株有效穗数的QTL均各有2个,分别位于染色体1A和5D的相同区间Xwmc312-Xwmc120和Xgwm271-Xcfd18;没有检测到控制穗粒数的QTL位点。

Identification of QTL for yield components can help further improve wheat production. In this study, a BC1F2 population （680 lines） derived from Annong0711 / Yannong19 was planted in automatic single precise seeding. The effective spike number per plant （ESN） and kernel number per spike （KPS） were measured at the yellow ripening stage The thousand-kernel weight （TKW） and grain yield per plant （GY） were determined after harvest. Inclusive composite interval mapping method was used for QTL analysis of yield and other related traits. The results indicated that three loci for TKW were respectively mapped on chromosome 1D （Xcfd27-Xwmc432 and Xwmc432-Xcfd61） and 4B （Xwmc89-Xwmc48）; two QTL for ESN and GY were identified on the same linkage interval of 1A （Xwmc312-Xwmc120） and 5D （Xgwm271-Xcfd18）; however, no QTL was detected for KPS.